Perhaps you should try some spelling variations:
optimisation algorithms » optimization algorithms, estimation algorithms, estimation algorithm
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
policy optimisation » policy optimization, topology optimization
risk optimisation » _ optimisation, risk estimation

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( policy optimisation algorithm ) or ( risk optimisation algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( policy optimisation algorithm ) OR ( risk optimisation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (( policy optimisation algorithm ) or ( risk optimisation algorithms ))*.